H02K 21/28
With armatures rotating within the magnets
Official title: with armatures rotating within the magnets
H02K21/28 (With armatures rotating within the magnets) appears on 52 US grants and 55 published applications in this corpus.
Search patents in H02K- Granted patents
- 52
- Published applications
- 55
- Assignees
- 42
- Inventors
- 118
- Latest grant
- 5 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 1 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 1 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 3 |
| 2013 | 0 | 2 |
| 2014 | 0 | 2 |
| 2015 | 1 | 2 |
| 2016 | 3 | 1 |
| 2017 | 0 | 0 |
| 2018 | 2 | 6 |
| 2019 | 2 | 2 |
| 2020 | 6 | 7 |
| 2021 | 3 | 7 |
| 2022 | 5 | 4 |
| 2023 | 5 | 6 |
| 2024 | 6 | 3 |
| 2025 | 2 | 4 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Electromagnetic power transfer system5 May 2026US 12,620,845 B2
- Flux machine21 Oct 2025US 12,451,741 B2ClearWater Holdings, Ltd.
- Motor with sensor coil9 Sep 2025US 12,413,120 B2LG Innotek Co., Ltd.
- Electric machine24 Dec 2024US 12,176,762 B2Robert Bosch GmbH
- Rotating electrical machine29 Oct 2024US 12,132,364 B2Denso Corporation
- Turbomachine comprising a permanent-magnet electric machine for powering a rotating load2 Jul 2026US 2026/0184431 A1Safran Aircraft Engines
- Adding rotors in series2 Jul 2026US 2026/0189115 A1Nextpower360 Co.
- Hybrid venting apparatus for generating electricity, system and method18 Sep 2025US 2025/0290488 A1Rebus Corporation Pty Ltd
- Electric generator with reduced input power3 Jul 2025US 2025/0219518 A1Zsph3 LLC
- Revived Repulsion (RR) Magnetic Configuration16 Jan 2025US 2025/0023404 A1
Most cited
By later US patents
- Compound interaction/induction electric rotating machine107US 4,441,043 A1984
- Lightweight high power electromotive device107US 4,900,965 AFisher Technology, Inc. · 1990
- Rotating electric machine65US 4,280,072 AMatsushita Electric Industrial Co., Ltd. · 1981
- Two-stage electric generator system42US 4,292,532 AH.O.P. Consulab Inc. · 1981
- Compound induction electric rotating machine32US 4,683,388 A1987